body {
  font-family: sans-serif, arial;
}
.expression {
  font-size: 20px;
  width: 500px;
}
.data {
  margin-top: 40px;
  border-collapse: collapse;
}
.data td {
  border: 1px solid #ccc;
  width: 100px;
}
.data th {
  text-align: left;
}
